Dr. Kroll retired as a lieutenant from the New York City Police Department in 2018, after 35 years of service. He received his Ph.D. and M.Phil. in Criminal Justice from the City University of New York, Graduate Center, and an MA in Criminal Justice from John Jay College of Criminal Justice. Professor Kroll joined the Division of Criminal Justice and Law Administration, Western Connecticut State University, in 2018. He has 17.5 years service in the New York Army National Guard as a Senior Non-Commissioned Officer, performing duties as an instructor and training site operations manager.